| 摘要 |
PROBLEM TO BE SOLVED: To provide a sewing machine driving device capable of suppressing the temperature rising of a stepping motor due to iron loss when the motor is stopped, and reducing power consumption. SOLUTION: The sewing machine driving device includes the stepping motor for driving a part to be driven and is the one for performing driving by distributing a high electric current when the part to be driven is operated and distributing a low electric current when the part to be driven is stopped. The device includes: a control means for distributing the electric current by PWM period and variably controlling the PWM period between a case for distributing the high electric current and a case for distributing the low electric current. COPYRIGHT: (C)2009,JPO&INPIT
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